US4751605A - Reader for a digital trip device associated with a current breaking device - Google Patents
Reader for a digital trip device associated with a current breaking device Download PDFInfo
- Publication number
- US4751605A US4751605A US06/948,114 US94811486A US4751605A US 4751605 A US4751605 A US 4751605A US 94811486 A US94811486 A US 94811486A US 4751605 A US4751605 A US 4751605A
- Authority
- US
- United States
- Prior art keywords
- microprocessor
- display device
- trip
- coupled
- display
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/02—Details
- H02H3/04—Details with warning or supervision in addition to disconnection, e.g. for indicating that protective apparatus has functioned
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/10—Operating or release mechanisms
- H01H71/12—Automatic release mechanisms with or without manual release
- H01H71/123—Automatic release mechanisms with or without manual release using a solid-state trip unit
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H1/00—Details of emergency protective circuit arrangements
- H02H1/0061—Details of emergency protective circuit arrangements concerning transmission of signals
- H02H1/0069—Details of emergency protective circuit arrangements concerning transmission of signals by means of light or heat rays
Definitions
- the present invention relates to a reader for a digital trip device associated with a current breaking device.
- An object of the present invention is to enable sophisticated trip devices for circuit breakers to be used, these trip devices providing the functions at present existing for high-power applications but achieved in such a way as to be less expensive.
- the initial idea for the present invention results from a cost analysis of the sophisticated digital trip devices available at present. With microprocessors being produced on a very large scale and being easy to program, the latter no longer constitute a determining factor in the cost of a digitial trip device. Paradoxically, the cost of the alphanumerical read-out accounts for a large part of the cost of the trip device.
- the present invention separates the reader and trip device functions and organizes the trip device and an independent reader in such a way that they can be associated simply and quickly.
- the present invention uses a reader for a digital trip device associated with a current breaking device in which the trip device comprises means of entering operating parameters and on-off indicating means, these means being coupled with a first microprocessor comprising memory areas in which said parameters and data characteristic of the current in the breaking device are entered.
- the reader is of the portable type, able to be coupled temporarily with the trip device, and comprises : an alphanumerical display means, a second microprocessor comprising memory areas, means associable with complementary means in the trip device to transfer the contents of the memory areas of the first microprocessor to the memory areas of the reader, these contents then being able to be displayed selectively by the reader during or after coupling.
- the reader comprises infra-red radiation receiving means, the receiver comprising complementary infra-red radiation means coupled to its microprocessor.
- a reader independent from the trip device is achieved, able to be temporarily associated with a trip device and therefore able to be used sequentially in relation with a large number of trip devices, which represents considerable practical advantages, since a single reader can be used for example by a company or a maintenance department to check a large number of trip devices-circuit breakers in different locations.
- FIG. 1 represents a digital control circuit breaker-trip device according to the prior art
- FIG. 2 represents a circuit breaker-trip device associated with a read-out according to the present invention
- FIG. 3 is the block diagram of the circuit breaker-trip device according to FIG. 2;
- FIG. 4 is the block diagram of the reader according to FIG. 2;
- FIG. 5 is the flow chart of the general tripping function.
- a circuit breaker 1 with an operating handle 4 is inserted in an electrical distribution circuit having three phase conductors RST, input 2 to and output 3 from the circuit breaker.
- the circuit breaker mechanism is controlled by a microprocessor-based digital solid-state trip device 10, this microprocessor itself comprising a central unit, a RAM area, a ROM area, and the other usual resources of a microprocessor. Only some of the conventional microprocessor access means and means of reading the information supplied by the latter are represented in FIG. 1.
- the microprocessor is sensitive both to these access means and to the signals from the sensors associated with the circuit breaker 1, and enables the currents at a given time in the conductors connected to the circuit breaker and the currents present in these conductors when a trip occurred to be stored in memory, thus enabling the cause and type of this trip to be determined.
- the front panel of the trip device 10 typically comprises a set of indicator lamps 11 each of which is designed to indicate the circuit breaker operating mode (closed state or open state) and, in case of the circuit breaker opening, the reason for tripping (for example, short delay, long delay, earth leakage phase fault).
- the trip device also comprises an alphanumerical read-out 15 on which the indications stored in the microprocessor RAM can be read, that is to say indicating for example the last current values when a trip occurred or the present current value in the case of normal operation.
- the front panel of the trip device comprises a set of actuating means 12, such as selector switches 13 or variable potentiometers 14 for initial programming of the trip device.
- the readout 15 also enables the setting values to be displayed. This set of access means and display means will be described in detail here since it is already known in the art.
- FIG. 2 represents a trip device/read-out assembly according to the present invention.
- the circuit breaker 1 and the trip device 10 in FIG. 1 are represented therein. It should however be noted that the trip device 10 no longer comprises alphanumerical display means.
- This trip device is moreover modified in a manner which will be described hereafter.
- This trip device can be associated by any coupling means with or without mechanical contact to a reader 20.
- This reader 20 essentially comprises an alphanumerical display means 21 on its front panel.
- each output phase conductor 3 of the circuit breaker 1 has associated with it a sensor 22 which delivers a signal proportional to the current flowing through the associated conductor, the signal being applied to a full-wave rectifier bridge 24.
- the outputs of the three bridges 24 are connected in series in a circuit comprising a measuring resistor 25 to provide at the resistor terminals a voltage signal proportional to the maximum current value.
- the voltage signal is applied to one of the inputs of a comparator 26, the other input of which receives a signal from a digital-to-analog converter 28 connected to a set of outputs (8 for example) 1 of a microprocessor 30.
- the output of the comparator 26 is connected to an input 2 of the microprocessor 30.
- the microprocessor sends via the converter 28 to the input of the comparator 26 successive values to which the signal representative of the current applied to the other input is compared. By detecting the equality of the values applied to the inputs of the comparator 26 and by successive approaches, the microprocessor 30 determines the phase current value.
- the converter 28 can be achieved simply by N resistors.
- the microprocessor 30, for example mode 7508 from the NEC Company, contains standard resources, such as the processing unit, ROM 32, RAM 34, calculation unit and input-output interfaces.
- An earth leakage fault signal delivered by an earth leakage transformer 36 and processed in a threshold circuit 38, is applied to an input 3 of the microprocessor 30.
- a power supply unit 40 connected to the phase conductors RST, supplies the electronic circuits.
- the tripping parameters are supplied to the microprocessor 30 by programming or by a setting unit 42 connected to an input 4.
- An output register 44 is connected to an output 5 of the microprocessor 30 for transmission on a channel S1 of a tripping order to a relay 46 and on four signalling channels S2-S5 to a light-emitting diode display unit 48.
- An output 6 of the microprocessor 30 supplies a remote transmission photo-emitting diode 52 via a processing unit 50.
- the microprocessor 30 collects the setting parameters entered via the setting unit 42 and reads the value of the phase current applied to the input 2. It calculates the heat rise of the protected equipment, for example the motor, by a thermal model and, by comparing with the setting thresholds, notably the long delay and short delay trip thresholds, emits a tripping order on output 5 transmitted to the relay 46 which causes the circuit breaker contacts to open. The maximum peak current value is stored. The output 5 transmits the information to the diodes 48 which indicate the type of trip performed. This information is also stored in the RAM 34. The cycle includes transmission of the information stored in the RAM 34 and/or ROM 32 to a reader by emission of infra-red signals by the diode 52.
- microprocessor can perform other functions and that the processing circuits can be different.
- the trip device 10 comprises coding means of the signals stored in its RAM 34 (these means can be simply achieved in software form) and transmission means of these coded signals to a receiver means included in the reader 20, this receiver means itself being associated with a decoder connected to a microprocessor provided in the reader 20.
- the reader 20 comprises the same microprocessor as the trip device 10. The contents of the trip device RAM can thus be simply transferred to the reader microprocessor RAM, both these microprocessors being organized in the same way.
- all the data contained in the first microprocessor RAM can be transferred to the second microprocessor (that of the reader), to be displayed on the read-out.
- the reader comprises a photo-receiver diode 54 receiving the signal emitted by the photo-emitting diode 52.
- the signal received is amplified and transmitted to a microprocessor 56, having a RAM 58 which stores the transmitted information.
- An output of the microprocessor 56 is connected by a register 60 to an alpha-numerical display unit 21, for example a three-digits display.
- a control signal notably by push-button 64, is applied to an input of the microprocessor 56 to control the display cycle which may comprise successive display of the setting values, the maximum currents, the tripping values and types, and such like.
- An assembly comprising a photo-emitting diode associated with the trip device and a photo-receiver diode associated with the reader can be selected as the coupling means between the trip device and the reader, these diodes being preferably active in the infra-red spectrum field to avoid the photo-receiver diode being activated by interference from ambient lighting.
- each word corresponds to a decimal value comprised between 0 and 15.
- a simple coding method consists in converting the contents of each memory cell, i.e. of each word, into a succession of pulses corresponding to the decimal avlue of this word, i.e. a sequence of a certain number of puses comprised for example between 1 and 16.
- This sequence of pulses can be sent to the photo-emitter at a relatively fast rate, for example by choosing pulses with a width of 30 microseconds separated by intervals of 200 microseconds. The interval between each pulse train may be in the order of one hundred milliseconds.
- recording can only begin in the reader when the latter has detected a succession of predetermined pulses, for example a sequence of more than 16 pulses.
- a worthwhile reason for arranging long time intervals between the pulse trains is to allow the trip device microprocessor to continue carrying out the tasks allocated to it during these intervals.
- Coding and decoding means of this kind are well known in the art.
- the reader according to the present invention can be used to proceed with the initial trip device settings, by reading on the display the set-point values entered by means of the switches or other control means of this trip device.
- the reader can also be used, if trips occure repetitively and are a cause for alarm, to determine the conditions prevailing at circuit breaker level when the latter trips. Readers of this kind can be used by maintenance departments internal or external to the company using for example motors protected by circuit breaker-trip device assemblies.
- the reader preferably includes an autonomous power supply.
Abstract
Description
Claims (5)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR8600110A FR2592737B1 (en) | 1986-01-03 | 1986-01-03 | READER FOR A DIGITAL TRIGGER ASSOCIATED WITH A POWER CUT-OFF APPARATUS |
FR8600110 | 1986-01-03 |
Publications (1)
Publication Number | Publication Date |
---|---|
US4751605A true US4751605A (en) | 1988-06-14 |
Family
ID=9330866
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US06/948,114 Expired - Fee Related US4751605A (en) | 1986-01-03 | 1986-12-29 | Reader for a digital trip device associated with a current breaking device |
Country Status (4)
Country | Link |
---|---|
US (1) | US4751605A (en) |
EP (1) | EP0232654B1 (en) |
DE (1) | DE3680320D1 (en) |
FR (1) | FR2592737B1 (en) |
Cited By (37)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4870531A (en) * | 1988-08-15 | 1989-09-26 | General Electric Company | Circuit breaker with removable display and keypad |
US4945443A (en) * | 1989-09-14 | 1990-07-31 | General Electric Company | Electronic circuit interrupter with combined keypad and display |
US4968944A (en) * | 1987-10-19 | 1990-11-06 | Myron Zucker, Inc. | Apparatus for detecting malfunctions of a single electrical device in a group of electrical devices, and methods of constructing and utilizing same |
US4972153A (en) * | 1987-10-19 | 1990-11-20 | Zucker Myron | Apparatus for detecting a plurality of energy levels in a conductor |
US4991042A (en) * | 1990-03-19 | 1991-02-05 | General Electric Company | Digital circuit interrupter with keypad data entry and display |
WO1993000623A1 (en) * | 1991-06-28 | 1993-01-07 | Square D Company | Electrical distribution system with improved circuit for multiple circuit breaker control |
GB2267190A (en) * | 1992-05-15 | 1993-11-24 | Ind Tech Res Inst | Circuit breaker with current range indicator |
WO1994007254A1 (en) * | 1992-09-14 | 1994-03-31 | Nu-Lec Pty Ltd | A memory or signature circuit for switchgear |
US5309312A (en) * | 1989-09-29 | 1994-05-03 | Basler Electric Company | Overcurrent protection relay with communications |
EP0609898A1 (en) * | 1993-02-05 | 1994-08-10 | Siemens Energy & Automation, Inc. | Plug-in ground fault monitor for a circuit breaker |
US5426592A (en) * | 1992-03-06 | 1995-06-20 | Siemens Energy & Automation, Inc. | Circuit breaker trip unit which automatically adapts to operated with a particular display module |
US5475609A (en) * | 1993-03-05 | 1995-12-12 | Square D Company | Load interrupter system |
US5581433A (en) * | 1994-04-22 | 1996-12-03 | Unitrode Corporation | Electronic circuit breaker |
US5596263A (en) * | 1993-12-01 | 1997-01-21 | Siemens Energy & Automation, Inc. | Electrical power distribution system apparatus-resident personality memory module |
US5596473A (en) * | 1995-02-06 | 1997-01-21 | Eaton Corporation | Electrical switches with current protection interfaced with a remote station and a portable local unit |
US5598039A (en) * | 1993-03-15 | 1997-01-28 | Touchstone Patent Trust | Method and apparatus for sensing state of electric power flow through a master circuit and producing remote control of a slave circuit |
US5706153A (en) * | 1996-06-03 | 1998-01-06 | Eaton Corporation | Programmer for starter |
US5751532A (en) * | 1996-02-28 | 1998-05-12 | Basler Electric Company | Intergrating reset overcurrent relay |
US5825643A (en) * | 1993-08-25 | 1998-10-20 | Square D Company | Programming device for a circuit breaker |
US5835324A (en) * | 1997-07-14 | 1998-11-10 | Hatton; Ken W. | Programmable electronic fuse box having a key pad which does not require fuse elements |
US5943201A (en) * | 1997-08-04 | 1999-08-24 | Eaton Corporation | Method and apparatus for setting trip profiles in electrical switches using a portable unit with a non-volatile memory |
EP1058283A2 (en) * | 1999-06-04 | 2000-12-06 | M. Schneider, Schaltgerätebau und Elektroinstallationen Gesellschaft m.b.H. | Monitoring system for low voltage switching devices |
US6297939B1 (en) | 1999-11-05 | 2001-10-02 | Siemens Energy & Automation, Inc. | Zone selective interlock for a circuit breaker system |
US6356422B1 (en) | 1999-11-05 | 2002-03-12 | Siemens Energy & Automation, Inc. | Circuit breaker communication and control system |
US6462921B1 (en) | 1999-11-05 | 2002-10-08 | Siemens Energy & Automation, Inc. | Auto chopping control during data acquisition for a circuit breaker |
US6504694B1 (en) * | 1999-11-05 | 2003-01-07 | Siemens Energy & Automation, Inc. | Circuit breaker system with ASM instantaneous overcurrent indication |
US6522937B2 (en) | 1996-03-19 | 2003-02-18 | Siemens Aktiengesellschaft | Hand-held device for a programmable control unit |
DE19959790B4 (en) * | 1999-12-07 | 2004-04-15 | Siemens Ag | Method and arrangement for the remotely controllable parameterization of the operating parameters of electrical equipment |
WO2004042761A1 (en) * | 2002-11-08 | 2004-05-21 | Eaton Electric Limited | Miniature switchgear devices |
US20060230296A1 (en) * | 2005-04-11 | 2006-10-12 | Watlow Electric Manufacturing Company | Controller housing with connector retention assembly and method |
US20060230298A1 (en) * | 2005-04-11 | 2006-10-12 | Watlow Electric Manufacturing Company | Compact limiter and controller assembly and method |
US20060229740A1 (en) * | 2005-04-11 | 2006-10-12 | Watlow Electric Manufacturing Company | Portable user interface assembly and method |
US20060249507A1 (en) * | 2005-04-11 | 2006-11-09 | Watlow Electric Manufacturing Company | Modular controller user interface and method |
US20070085693A1 (en) * | 2005-10-19 | 2007-04-19 | E.O. Schweitzer Manufacturing Company, Llc | System, a tool and method for communicating with a faulted circuit indicator using a remote display |
US20080231463A1 (en) * | 2005-10-19 | 2008-09-25 | Feight Laurence V | System, a Tool and a Method for Communicating with a Faulted Circuit Indicator Using a Display |
US20090126652A1 (en) * | 2007-11-20 | 2009-05-21 | Mark Allan Murphy | Water heater and method of customizing the water heater |
US20090140871A1 (en) * | 2007-12-03 | 2009-06-04 | Siemens Energy & Automation, Inc. | Devices, Systems, and Methods for Managing a Circuit Breaker |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01103103A (en) * | 1987-10-15 | 1989-04-20 | Ohbayashi Corp | Power control system |
FR2654539B1 (en) * | 1989-11-16 | 1994-04-08 | Merlin Gerin | ELECTRONIC TRIGGER WITH A FRONT PANEL CONSISTING OF A FLAT SCREEN DISPLAY. |
FR2666901A1 (en) * | 1990-09-18 | 1992-03-20 | Electricite De France | Apparatus for detecting faults in an electrical network |
EP0513319A4 (en) * | 1990-11-30 | 1993-12-22 | Square D Co | Display for a circuit breaker trip unit |
FR2713308B3 (en) * | 1993-11-29 | 1995-11-24 | Lorraine Laminage | Automated deposit and return system of an industrial installation comprising several bodies to deposit or withdraw. |
US5488338A (en) * | 1994-05-25 | 1996-01-30 | General Electric Company | Electronic trip assembly for high ampere-rated circuit breaker |
DE9414333U1 (en) * | 1994-09-03 | 1994-11-03 | Abb Patent Gmbh | Miniature circuit breakers or residual current circuit breakers |
DE19721591A1 (en) * | 1997-05-23 | 1998-11-26 | Maier & Cie C | Current limiting switch |
FR3062949B1 (en) * | 2017-02-16 | 2021-05-28 | Hager Electro Sas | CIRCUIT BREAKER |
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US4358810A (en) * | 1981-01-21 | 1982-11-09 | Westinghouse Electric Corp. | Circuit breaker with alarm |
US4429340A (en) * | 1981-03-25 | 1984-01-31 | General Electric Co. | Bargraph displays for static trip circuit breakers |
FR2531239A1 (en) * | 1982-07-29 | 1984-02-03 | Naimer Hubert | MICROPROCESSOR CONTROL ACTUATING APPARATUS |
US4470092A (en) * | 1982-09-27 | 1984-09-04 | Allen-Bradley Company | Programmable motor protector |
US4600918A (en) * | 1981-06-29 | 1986-07-15 | Indesit Industria Elettrodomestici Italiana Spa | Equipment for reproduction of alphanumerical data |
US4652769A (en) * | 1984-02-14 | 1987-03-24 | Ion Tech, Inc. | Module power supply |
-
1986
- 1986-01-03 FR FR8600110A patent/FR2592737B1/en not_active Expired
- 1986-12-22 EP EP19860402907 patent/EP0232654B1/en not_active Expired - Lifetime
- 1986-12-22 DE DE8686402907T patent/DE3680320D1/en not_active Expired - Fee Related
- 1986-12-29 US US06/948,114 patent/US4751605A/en not_active Expired - Fee Related
Patent Citations (7)
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US4119948A (en) * | 1976-04-29 | 1978-10-10 | Ernest Michael Ward | Remote meter reading system |
US4358810A (en) * | 1981-01-21 | 1982-11-09 | Westinghouse Electric Corp. | Circuit breaker with alarm |
US4429340A (en) * | 1981-03-25 | 1984-01-31 | General Electric Co. | Bargraph displays for static trip circuit breakers |
US4600918A (en) * | 1981-06-29 | 1986-07-15 | Indesit Industria Elettrodomestici Italiana Spa | Equipment for reproduction of alphanumerical data |
FR2531239A1 (en) * | 1982-07-29 | 1984-02-03 | Naimer Hubert | MICROPROCESSOR CONTROL ACTUATING APPARATUS |
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Cited By (52)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4968944A (en) * | 1987-10-19 | 1990-11-06 | Myron Zucker, Inc. | Apparatus for detecting malfunctions of a single electrical device in a group of electrical devices, and methods of constructing and utilizing same |
US4972153A (en) * | 1987-10-19 | 1990-11-20 | Zucker Myron | Apparatus for detecting a plurality of energy levels in a conductor |
JP2885837B2 (en) | 1988-08-15 | 1999-04-26 | ゼネラル・エレクトリック・カンパニイ | Circuit breaker with removable display and keypad unit |
DE3926414A1 (en) * | 1988-08-15 | 1990-02-22 | Gen Electric | SELF-SWITCH WITH REMOVABLE DISPLAY AND KEYBOARD UNIT |
JPH02119026A (en) * | 1988-08-15 | 1990-05-07 | General Electric Co (Ge) | Detachable display and breaker with key pad-unit |
DE3926414B4 (en) * | 1988-08-15 | 2006-02-16 | General Electric Co. | Auto switch with removable display and keyboard unit |
US4870531A (en) * | 1988-08-15 | 1989-09-26 | General Electric Company | Circuit breaker with removable display and keypad |
US4945443A (en) * | 1989-09-14 | 1990-07-31 | General Electric Company | Electronic circuit interrupter with combined keypad and display |
US5309312A (en) * | 1989-09-29 | 1994-05-03 | Basler Electric Company | Overcurrent protection relay with communications |
US4991042A (en) * | 1990-03-19 | 1991-02-05 | General Electric Company | Digital circuit interrupter with keypad data entry and display |
WO1993000623A1 (en) * | 1991-06-28 | 1993-01-07 | Square D Company | Electrical distribution system with improved circuit for multiple circuit breaker control |
US5490086A (en) * | 1992-03-06 | 1996-02-06 | Siemens Energy & Automation, Inc. | Plug-in ground fault monitor for a circuit breaker |
US5426592A (en) * | 1992-03-06 | 1995-06-20 | Siemens Energy & Automation, Inc. | Circuit breaker trip unit which automatically adapts to operated with a particular display module |
GB2267190A (en) * | 1992-05-15 | 1993-11-24 | Ind Tech Res Inst | Circuit breaker with current range indicator |
WO1994007254A1 (en) * | 1992-09-14 | 1994-03-31 | Nu-Lec Pty Ltd | A memory or signature circuit for switchgear |
EP0609898A1 (en) * | 1993-02-05 | 1994-08-10 | Siemens Energy & Automation, Inc. | Plug-in ground fault monitor for a circuit breaker |
US5475609A (en) * | 1993-03-05 | 1995-12-12 | Square D Company | Load interrupter system |
US5598039A (en) * | 1993-03-15 | 1997-01-28 | Touchstone Patent Trust | Method and apparatus for sensing state of electric power flow through a master circuit and producing remote control of a slave circuit |
US5825643A (en) * | 1993-08-25 | 1998-10-20 | Square D Company | Programming device for a circuit breaker |
US5596263A (en) * | 1993-12-01 | 1997-01-21 | Siemens Energy & Automation, Inc. | Electrical power distribution system apparatus-resident personality memory module |
US5666256A (en) * | 1993-12-01 | 1997-09-09 | Siemens Energy & Automation, Inc. | Electrical power distribution system apparatus-resident personality memory module |
US5581433A (en) * | 1994-04-22 | 1996-12-03 | Unitrode Corporation | Electronic circuit breaker |
US5793596A (en) * | 1994-04-22 | 1998-08-11 | Unitrode Corp | Floating positive circuit breaker |
US5596473A (en) * | 1995-02-06 | 1997-01-21 | Eaton Corporation | Electrical switches with current protection interfaced with a remote station and a portable local unit |
US5751532A (en) * | 1996-02-28 | 1998-05-12 | Basler Electric Company | Intergrating reset overcurrent relay |
US6522937B2 (en) | 1996-03-19 | 2003-02-18 | Siemens Aktiengesellschaft | Hand-held device for a programmable control unit |
US5706153A (en) * | 1996-06-03 | 1998-01-06 | Eaton Corporation | Programmer for starter |
US5835324A (en) * | 1997-07-14 | 1998-11-10 | Hatton; Ken W. | Programmable electronic fuse box having a key pad which does not require fuse elements |
US5943201A (en) * | 1997-08-04 | 1999-08-24 | Eaton Corporation | Method and apparatus for setting trip profiles in electrical switches using a portable unit with a non-volatile memory |
EP1058283A3 (en) * | 1999-06-04 | 2003-03-12 | M. Schneider, Schaltgerätebau und Elektroinstallationen Gesellschaft m.b.H. | Monitoring system for low voltage switching devices |
EP1058283A2 (en) * | 1999-06-04 | 2000-12-06 | M. Schneider, Schaltgerätebau und Elektroinstallationen Gesellschaft m.b.H. | Monitoring system for low voltage switching devices |
US6356422B1 (en) | 1999-11-05 | 2002-03-12 | Siemens Energy & Automation, Inc. | Circuit breaker communication and control system |
US6462921B1 (en) | 1999-11-05 | 2002-10-08 | Siemens Energy & Automation, Inc. | Auto chopping control during data acquisition for a circuit breaker |
US6504694B1 (en) * | 1999-11-05 | 2003-01-07 | Siemens Energy & Automation, Inc. | Circuit breaker system with ASM instantaneous overcurrent indication |
US6297939B1 (en) | 1999-11-05 | 2001-10-02 | Siemens Energy & Automation, Inc. | Zone selective interlock for a circuit breaker system |
US6661632B2 (en) | 1999-11-05 | 2003-12-09 | Siemens Energy & Automation, Inc. | Data acquisition system for a circuit breaker |
DE19959790B4 (en) * | 1999-12-07 | 2004-04-15 | Siemens Ag | Method and arrangement for the remotely controllable parameterization of the operating parameters of electrical equipment |
WO2004042761A1 (en) * | 2002-11-08 | 2004-05-21 | Eaton Electric Limited | Miniature switchgear devices |
US20060230298A1 (en) * | 2005-04-11 | 2006-10-12 | Watlow Electric Manufacturing Company | Compact limiter and controller assembly and method |
US7652888B2 (en) | 2005-04-11 | 2010-01-26 | Watlow Electric Manufacturing Company | Controller housing with connector retention assembly and method |
US20060229740A1 (en) * | 2005-04-11 | 2006-10-12 | Watlow Electric Manufacturing Company | Portable user interface assembly and method |
US20060249507A1 (en) * | 2005-04-11 | 2006-11-09 | Watlow Electric Manufacturing Company | Modular controller user interface and method |
US8044329B2 (en) | 2005-04-11 | 2011-10-25 | Watlow Electric Manufacturing Company | Compact limiter and controller assembly and method |
US20060230296A1 (en) * | 2005-04-11 | 2006-10-12 | Watlow Electric Manufacturing Company | Controller housing with connector retention assembly and method |
US7719436B2 (en) | 2005-10-19 | 2010-05-18 | Schweitzer Engineering Laboratories, Inc. | System, a tool and a method for communicating with a faulted circuit indicator using a display |
US20080231463A1 (en) * | 2005-10-19 | 2008-09-25 | Feight Laurence V | System, a Tool and a Method for Communicating with a Faulted Circuit Indicator Using a Display |
US7382272B2 (en) * | 2005-10-19 | 2008-06-03 | Schweitzer Engineering Laboratories, Inc. | System, a tool and method for communicating with a faulted circuit indicator using a remote display |
US20070085693A1 (en) * | 2005-10-19 | 2007-04-19 | E.O. Schweitzer Manufacturing Company, Llc | System, a tool and method for communicating with a faulted circuit indicator using a remote display |
US20090126652A1 (en) * | 2007-11-20 | 2009-05-21 | Mark Allan Murphy | Water heater and method of customizing the water heater |
US7822325B2 (en) | 2007-11-20 | 2010-10-26 | A. O. Smith Corporation | Water heater and method of customizing the water heater |
US20090140871A1 (en) * | 2007-12-03 | 2009-06-04 | Siemens Energy & Automation, Inc. | Devices, Systems, and Methods for Managing a Circuit Breaker |
US7995314B2 (en) | 2007-12-03 | 2011-08-09 | Siemens Industry, Inc. | Devices, systems, and methods for managing a circuit breaker |
Also Published As
Publication number | Publication date |
---|---|
DE3680320D1 (en) | 1991-08-22 |
EP0232654A1 (en) | 1987-08-19 |
FR2592737B1 (en) | 1988-03-18 |
FR2592737A1 (en) | 1987-07-10 |
EP0232654B1 (en) | 1991-07-17 |
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